finasteride

Finasteride (marketed as Proscar, Propecia, Fincar, Finpecia, Finax, Finast, Finara, Finalo, Prosteride, Gefina, Finasterid IVAX) is an antiandrogen which acts by inhibiting type II 5-alpha reductase, the enzyme that converts testosterone to dihydrotestosterone (DHT). It is used as a treatment in benign prostatic hyperplasia (BPH) in low doses, and prostate cancer in higher doses. It is also indicated for use in combination with doxazosin therapy to reduce the risk for symptomatic progression of BPH. Additionally, it is registered in many countries for androgenetic alopecia (male-pattern baldness).
See more at Wikipedia.org...

Finasteride is a drug that belongs to the class of androgen inhibitors, which means that it blocks the production of male sex [more]Finasteride - Community and Resources

[fi-NAS-ta-ride]
A drug used to reduce the amount of male hormone (testosterone) produced by the body.